Heating means for rolls



G. FOX

HEATING 'MEANS FOR, ROLLS I Filed April. 1925 {2 Sheets-Sheet 1 Aggi- 9 1927. 1,638,626

' f Gordon J'Zx,

Aug. 9, 1927. G. Fox

HEATING MEANS {FOR ROLLS Patented Aug. 9, 127.

GORDON FOX, OF CHICAGO,IIrLINOIS,'ASSIGNOR TO-FREYN ENGINEERING COMPANY,

OF'OHICAGO, ILLINOIS, A CORPORATION 01 MAINE.

HEATING MEANS FOR ROLLS.

Application filed April 80, 1925. Serial No. 26,904.

' 5 used in. sheet mills. In cold rolling sheets for finishing purposes it is difiicult to retain 't-herollsin perfect shape due to the fact that differences in friction at the bearings lead to variations in temperature. Moreover, differences in the work done upon the sheets due to variation of thickness causes the surface of the rolls to heat upmore at one point than at other points. temperature referred to tend to cause variations inexpansion of the rolls wlnchtend to destroy parallelism of the roll contours. In order tocompensate for such variations in temperature it has been proposed to apply a gas flame at portions of the roll which require heat treatment. Such practice 18 open to considerable objection, however, certain difiiculties being due to the dificulty in properly controlling the gas flame and restricting said flame to the desired zone. Difiiculty has also been encountered in the rolling of sheets by the continuous process, in maintaining the proper contour of the roll and in maintaining the proper temperature. This difficulty has been largely responsible for the failure of attempts to roll sheets by the continuous process.

An object of the present invention is to provide roll heating means which may be applied to the rolls of a mill without interfering with the operation of said rolls and which will permit eificient control of the temperature in said rolls.

A further object is to provide heating means for rolls which permit ready control to of the heat applied at different portions of the rolls disposed longitudinall of said rolls.

A further object is to provi e a roll heating means of improved type to meet the needs for commercial operation. I

Further objects will appear as the description proceeds. Referring to the drawings? Figure l is a sectional view of a sheet mill taken transversely of said mill and illustrat- I 59 ing one embodiment of the present invention;

Figure 2 is-a view in side elevation of the structure shown in Figure 1 and Figure 3 1s a diagrammatic view illus- The differences in,

- ditl'erent diameters.

trating an electric circuit applicable to thepresent invention.

The numerals 11 indicate a pair of rolls which are rotatably carried in parallel relationship with one another by the supportingmembers 2-2. Said supporting memillustrated) whereby the distance between the axes of the rolls.l1 may be varied as desired. The supporting members 22 are sl dably mountedupon the bed plates 3-3, whereby said supporting members may be disposed at the proper distance for takingrolls l-1 of different lengths.

The present invention contemplates heating members 4 and 5 mounted in heat conducting relationship with the upper and lower rolls, respectively. Said heaters arelocated above the upper roll 1 and the heating member 5 is located below the lower roll 1. According to the structure illustrated, heating members are provided having longitudinal dimensions almost as long as the rolls to be heated, though the invention is not limited to any particular ratio between the length of the rolls and the length of the heating members. bers may be materially shorter than the rolls, and the present invention contemplates means whereby the heating members may be moved longitudinally of said rolls, whereby to apply heat selectively at ditferent regions disposed longitudinally of the rolls. I

The heating members 4 and 5 are arranged inlthe form of sectors and are somewhat flexible. Said heaters are adj ustably-mounted, in order that a small air gap may be maintained with compensation for rolls-of Said heaters may con- The heating mem- 30 bers are provided with adjustingmeans (not;

tain lagging or heat insulating material to prevent excessive loss through heat radiation. On the inner surfaces of the sectorshaped heaters are located a plurality of electric heating elements 66 .of the strip type, which heating e'lon'ients have their long dimensions arranged circumferentially of the rolls. The circuit of each of the heating elements 66 across the mains 88. It will" be noted that zone control may be readily v had by individuallycontrolling the electric which may be braced adjacen circuits of the heating elements 66.

Each of the heating members 4 and 5 may have a sufficient number of heating elements 6-6 on the inner side thereof to apply heat when required to practically the entire length of roll, from hearing to bearing. If preferred, relatively sh rt heating members 4 and 5 may be provided, and said heating members may be moved longitudinally of the rolls, whereby the heat may be applied locally to the region desired. In order to make'it possible to move the heating elements at and 5 longitudinally of the rolls, supporting means may be provided which slidably carry said heating elements A and 5- Carried at the upper regions the supports are the bars 9--9, which vided with the collars l0 which may be adjustably connected to said bars 9-4? ,(as, for enam 'le, by set screws at pre ierred regions longitudinally of said bars 9t. Said collars iii-1Q provided with screw-threaded studs llll, which adjustably support the cross bearers of said cross bearers l2l2 is providedwith the downwardly exrrendin arm's 13-13,

Ju extremities by the cross brace is; The numerals l5l5 indicate supporting members carried at the lower extremities the arms 13-13, which supporting members 15-l5 are connected to the sides the heating member a. The middle portion of the heating member a may be supported by the cross braces 1 l14. le rminals'l61 6 carried by the heating member 4 provide convenient means for'connecting the "various elements 66 in circuit. The bed plates 3-3 are provided with upstanding screw-threaded studs 17-17, which are adjustable longitudinally of said bed plates 3-3 and which adjustably support cross bearers 18. Said cross bearers 18 are provided with the upm-standing arms 19-19 carrying the supporting members "2020 for attachment to the two sides of the heating member 5. The heating member!) is provided with the terminals 1616, which may be identical with those referred to above in connection with the heating member 4. Said screw-threaded studs 17-17 may be adjustable longituiilinally of the bed plates 33 (by means n01 illustrated), whereby the cross bearers 1818 may be adjusted longitudinally of the rolls.

By reason of the fact that the heating members 4 and 5 are disposed in positions such that they do not interfere with the bars are pro 12-12. Each to their lower throat between the rolls 1--1, and by reason of the fact that said heating members are held in spaced relationship with said rolls, the temperature otsaid rolls may be controlled during rolling operations. Inasmuch as the heating elements 6-6, which are spaced longitudinally of the rolls, are independently controllable, any desired localization of the heat may be readily accomplished. Moreover, if it is preferred to userelatively short heating memberse and 5, said heating members may be adjusted longitudinally of the rolls, whereby to localizetheir application ofh-eat, to the end that the desired distribution of heat may be had.

Though a preferred embodiment of the present invention has been described in dey tail, it will be clear that many modifications will occur to those skilled in the art. intended to cover all such modifications that fall within the scope of the appended claims.

W hat is claimed is: l. in combination, a pair of rolls and flex ible heating members cooperatively assoplurality electrical heating strips na ling their dimensions arranged cir-cumiterentially oft said rolls being dis posed in spaced relationship longitudinally of said rolls, and means for independently controlling the-energization oi said strips,

2. in cembination, a pair of rolls mounted in parallel relationship with one another forming a pass for the reception of material to be operated upon, each of said rolls hava flexible heater associated therewith, said heaters including rembers arranged circumterentially of said rolls but spaced therefrom, said heaters being disposed out of obstructing relationship said 5 s said heaters being provided with hea ing strips mounted in spaced relationship longi tudinally of said rolls, said heating strips having their long'dimensions arranged circumferentially of said rolls.

. 31 in combination, a pair of rolls mounted in parallel relationship with one another and forming a pass for the reception of material to be operated upon, each of said rolls havmg a flexible heater associated therewith,

said heaters including members arranged circumferentially of said rolls but spaced therefrom, said heaters being disposed out therewith, said heating members init'll) of obstructing relationship with said pass,

said heaters being provided with heating strips mounted in spaced relationship longitudinally of'said rolls, said heating strips having their long dimensions arranged circumferentially of said rolls, said heating strips being pmvided with means for individually controlling the heating efi'ects of said strips.

4. In combination, a pair of rolls mounted in parallel relationship with one'another, each of said rollshaving a heater associated its being measles therewith, said heaters including members arranged circumferentially of said rolls but spaced therefrom, said heaters being dis' posed out of obstructing relationship with the region between said rolls, said heaters of materially less length than said rolls longitudinally of said rolls and being adjustably mounted longitudinally of said rolls, whereby the local application of heat to different regions of said rolls may be readily accomplished.

5.. In combination, a pair of rolls forming a pass for the reception of material to .be operated upon, means for rotatably supporting said rolls, heaters arranged in circumferential relationship with said rolls but spaced therefrom, said heaters being out of obstructing relationship with said pass, and means for adjustably carrying said heaters whereby thespaced relationship between said heaters and said rolls may be controlled.

6. In combination, a pair of rolls, 'a heater mounted -in proximity to one of said rolls but in spaced relationship therewith, and means for supporting said heater, said supporting means being adjustable, whereby said heater may be secured at selective positions longitudinally of said rolls, said heater being disposed out of obstructing relationship with the pass between said rolls, whereby the temperature of the rolls may be controlled during the passage of work between said rolls.

5 In combination, a pair of'rolls forming mounted in proximity to one of said rolls but in spaced relationship therewith, and means for supporting said heater, said supporting means being adjustable, whereby said heater may be secured at selective positions longitudinally ofsaid rolls, said heater being pro- 40 vided with heating strips mounted in spaced relationship longitudinally of said rolls, said heating strips having their long dimensions arranged circumferentially of said rolls.

8. In combination, a pair of rolls, aheater I said heater may be secured at selective positions longitudinally .of said rolls, said heater being provided with heating stri mounted in spaced relationship longitutif nally of said rolls, said heating strips havingtheir long dimensions arranged circumferentially of said rolls, said heating strips being provided with means for individually controlling the heating eifects of said strips. signed at Chicago, Illinois, this 94 day of April, 1925.

eonnon Fox. 

